.container {
    width: 800px;
    height: 600px;
    margin: 100px auto;
    outline: 1px solid black;
    display: flex;
    /* flex-wrap:wrap;
    flex-direction:row ; */
    flex-flow: row wrap;
    justify-content:  space-around;
    align-items: center;
    /* align-content:flex-start; */
}

.box {
    width: 100px;
    height: 100px;
    outline: 1px solid red;

}
/* .b3{
    font-size: 4em;
}
.b2{
    width: 200px;
    height: 200px;
}
.b5{
    width: 160px;
    height: 180px;
    font-size: 2em;
} */
.btn{
    height: 60px;
}
.img{
    vertical-align: baseline;
}
/* .container .box{
    height: auto;
} */